My house already come with the vent system and piping, the installer need open the hole and connect the hose and tape properly the connection. Most contractor wont do it, you can ask, if they dont, just ask the seller recommend you their usual contractor. I just bought my Fotile hood from zhilanwee last time, i use his installer because my contractor dont do it (usually they wont, they dont wanna take the risk). I pay around rm250 - 300 depend on the complication. Quite satisfied, nice workmanship and service =).